Researchers investigatedwhether Harley the dog could correctly choose between two objects when a researcher bowed towards one of the cups.

Harley got 9 right out of 10. Suppose instead the numbers had been 18 right out of 20.

1. Which of the three influences on strength of evidence (distance, sample size, one- or two-sided) would change? Which would stay the same?
2. Overall, the evidence against the null hypothesis would be ______ (stronger, weaker).